以下关于域名查询的叙述中，正确的是（ ）。
- A.正向查询是检查A记录，将IP地址解析为主机名
- B.正向查询是检查PTR记录，将主机名解析为IP地址
- C.反向查询是检查A记录，将主机名解析为IP地址
- D.反向查询是检查PTR记录，将IP地址解析为主机名
正确答案及解析
正确答案
解析
DNS资源记录：
SOA记录：SOA说明能解析这个区域的DNS服务器中哪个是主服务器。
NS记录：用于标识区域的DNS服务器，有几台提供服务。
A记录：也称为主机记录，是DNS名称到IP地址的映射，用于正向解析。
PTR记录：IP地址到DNS名称的映射，用于反向解析。
包含此试题的试卷
你可能感兴趣的试题
Advancements in （ ）have contributed to the growth of the automotive industry through the creation and evolution of self-driving vehicles.
-
- A.Artificial Intelligence
- B.Cloud Computing
- C.Internet of Things
- D.Big Data
- 查看答案
In project human resource management , （ ）is not a source of power for the project manager.
-
- A.referent power
- B.expert power
- C.reward power
- D.audit power
- 查看答案
At the project establishment stage , the feasibility study mainly includes techinical feasibility analysis , （ ）, operation environment feasibility analysis and other aspects of feasibility analysis.
-
- A.detail feasibility analysis
- B.opportunity analysis
- C.economic feasibility analysis
- D.risk analysis
- 查看答案
（ ）is a grid that shows the project resources assigned to each work package.
-
- A.Stakeholder engagement assessment matrix
- B.Requirements traceability matrix
- C.Probability and impact matrix
- D.Responsibility assignment matrix
- 查看答案
Xinhua News Agency reported in January 2022，Chian will further promote the developmet of a digital economy during the 14th Five-Year Plan eriod（2021-2025）. The plan also emphasized industrial （ ）transformation.
-
- A.digital
- B.networking
- C.intelligentize
- D.informatization
- 查看答案